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Re: [css-text] I18N-ISSUE-333: 'letter-spacing' and Arabic

From: Koji Ishii <kojiishi@gluesoft.co.jp>
Date: Wed, 23 Apr 2014 07:58:23 +0000
To: Jonathan Kew <jfkthame@googlemail.com>
CC: Najib Tounsi <ntounsi@emi.ac.ma>, "Phillips, Addison" <addison@lab126.com>, "CSS WWW Style (www-style@w3.org)" <www-style@w3.org>, www International <www-international@w3.org>
Message-ID: <94D2DCD0-9DDF-4F2E-ADDB-9AF2A89AA02F@gluesoft.co.jp>
On Jan 26, 2014, at 1:30 AM, Jonathan Kew <jfkthame@googlemail.com> wrote:

> While letter-spacing should not break Arabic cursive connection, it probably *should* break optional stylistic ligatures such as lam-meem that some fonts may use by default. Only mandatory ligatures (i.e. lam-alef) that are a fixed requirement of the script's shaping behavior would be expected to be preserved in letter-spaced text.

We have the following text[1]:

> When the effective letter-spacing between two characters is not zero (due to either justification or non-zero computed ‘letter-spacing’), user agents should not apply optional ligatures.

I suppose this clarifies your concern, please let me know if not.

[1] http://dev.w3.org/csswg/css-text/#letter-spacing

/koji
Received on Wednesday, 23 April 2014 07:59:00 UTC

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